Hi Does anyone know what BSIM4v5.5.0 file is and how I can fix this error? Thank you.

Please send the Test.spice file. WIll run the sim on my system and see if there are errors.

Hi, I have sent both the error and the spice files. Thank you for your time.

I think your ngspice version is too old. Try to do

ngspice -v

to see. I have version 40 just to give a reference. I don't get any BSIM errors, but simulation fails because circuit matrix is singular. This happens if there are floating nodes (expecially supply nodes) Please send the opamp.sch schematic file and I will check.

Thank you for your response. Here is the schematic file.

please send also op_amp.sym and op_amp.sch

Here it is.

Thank you, please send also op_amp.sch. there is one file for the symbol (.sym) and one for the schematic (.sch)

Hi Stefan, Thank you for your time. Here is the all file. Please try these files. Thanks.

When I load your example the following warning appears:

Here is the ngspice version:

@sepide asgari I finally found the root cause of your failure. You must create a

.spiceinit

file in the directory where ngspice runs (by default this is

~/.xschem/simulations

). The file must have the following content:

set ngbehavior=hsa
set ng_nomodcheck 
set num_threads=4

Without this file ngspice does not correctly understand the .lib model file and I also get the same failure.

Hi Stefan, Thank you so much. Now, it works.